Stave-machine



UNITED STATES PATENT OFFICE.

DANIEL DRAWBAUGH, OF EBERLYS MILLS, PENNSYLVANIA.

STAVE-MACI-IINE.

Specification of Letters Patent No. 12,900, dated May*22, 185,5.

To all whom it may concern:

Be it known that I, DANIEL DRAWBAUGH, of Eberlys Mills, in the county ofCumberland and State of Pennsylvania, have invented a new and ImprovedMachine for Cutting Staves; and I do hereby declare that the followingis a full, clear, and exactdescription of the construction and operationof the same, reference being had to t-he annexed drawings, making a partof this specication, in which- Figure 1, is a vertical longitudinalsection of my improved machine, the plane of section being through thecenter. Fig. 2, is an end view of the same. Fig. 3, is a detachedperspective view of the stationary concave, and the vibrating bed.

Similar letters of reference indicate corresponding parts 1n the severalfigures.

The nature of my invention consists in the combination of a stationaryconcave, vibrating bed, curved knife, and pressure roller, constructed,arranged, and operating, as will be fully shown hereafter, for thepurpose of cutting staves from a block in a smooth and perfect manner.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

A, A, represent two uprights, the lower ends of which are secured to aproper base, B.

On the upper parts of the uprights there is suspended upon pivots, (a),(a), a vibrating bed, C, the pivots, (a), (a), passing through eyes,(b), (b), at the back end of the bed, C, an eye, (Z9), being at each endof the bed-one eye and one pivot are shown grooves, (o), (o), (c), inthe front edge of the bed, C, as clearly shown in Fig. 3.

F, is a vertical sliding frame, the lower end of which works loosely ona rod, G, the ends of which rod work on ways, (d), (d), attached to theinner sides of the uprights, A, A, one way to each upright. At each sideof the frame, F, there is attached a plate, Gr. The upper ends of theseplates are connected by pivots, (e), to the front part of the vibratingbed, C, see dotted lines,

ig. l.

H, is a lever, having its fulcrum at (f), and its inner end connected bya smaller lever, I, to the lower part of the frame, F, as shown in Fig.l.

I', is a knife, the ends of which are secured by bolts, (g), to theupper parts of the uprights, A, A, see Figs. 1, and 2. The edge of theknife is somewhat curved, and is placed a little inward ofthe top of theconcave, as shown in Fig. l, the space between the edge of the knife andconcave, being equal, o-f course, to the desired thickness of thestaves. The knife may be adjusted, or set farther in or out from theconcave by means of the bolts, (g), and staves of a `greater or lessthickness, cut as desired.

J, is a pressure roller placed directly over the top of the concave, D,and adjoining the knife, I, see Figs. l, and 2. K, is the axis of thepressure roller, J, and said axis works in bearings, L, L, attached tothe uprights, A, by pins, (7a.), (7L), one of which is shown by dottedlines in Fig. l.

M, M, are springs which bear against the bearings, L, and keep thefriction roller against the knife, see Figs. l, and 2.

Operation. The block, N, from which the staves are cut, is placed uponthe vibrating bed, C, see dotted lines, Fig. 1, one edge of the blockbearing against the concave, the vibrating bed is first moved downwardby raising the outer end of the lever, H, in order to allow the edge ofthe block to bear against the concave. The outer end of the lever', H,is then pressed downward, and the vibrating bed is raised, and the blockforced against the knife, I, which cuts 0H a stave corresponding inthickness to the space between the knife and concave. The pressureroller, J, keeps the stave against the knife, and prevents the stavesfrom splitting when nearly cut from the block, and also causes them tobe cut in perfect shape corresponding to the concave.

The ribs, or guides, E, work in the grooves (c), in the edge of thebeds, C, cause the bed to operate evenly, and without any unnecessaryplay.

I do not claim separately any of the parts of the above machine, but,

What I claim as my invention and desire straight as required for stavesheading 0I, 10 other purposes substantially as herein described, the barD being changed or reversed as described.

DANIEL DRAWBAUGH.

Vitnesses:

SAMUEL BITNER, JOHN E. ROTH.

